Waterproofed plastic paper and method of producing the same



Feb. 4, 1936. E. v. RODGERS 2,029,390

WATERPROOFED PLASTIC PAPER AND METHOD OF PRODUCING THE SAME Filed June 8, 1933 CREPED fZnr IAPEE 597a: V /f' 2 005915 I NVENTO R i2 ATTORNEY 7 Patented Feb. 4,- 1936 UNITED STAT My invention relates paper and to may be mentioned per for articles readily moisture, (b) candy and etc. In

pre start 'terproofed product.

aring 'my waterproofed' plastic as PATENT OFFICE amazon WATEBPBO ma'rnon Earle V. Rodgers,

oran rms'nc rarer. "arm or rnonucmd ran sans Keniiworth, N. J.

Application June 8, 1933, Serial No. 614,822, 4 Claims. (Ci. 91-68) to waterproofed plastic producing the same.

my invention uses, among which chewing gum wrappers,

p p I either with creped or fiat paper, the

flnal product in either case being a creped wa- Iwill first describe the methodwhencreped Paper is the starting Pigm nts plication of the coat any approved coating or The pigments are used to determine part color, opacity and pigments which oxide,'antimony oxide, phate, copper sulphate, lime, pulverized zinc and aluminum.

A specific example proved method consists paper through a of this form hath made up of material? The 'creped paper is coated with a lacquer and waterproofing materials, the apof lacquer being effectedby or coating containing lithographic weight, and among minerals, metsuch as lead barium sul- French chalk, hydrated v marble and zinc sulphide. The preferred waterproofing material is one selected from the stearate group,

suchascalcium,

of my imln.passing the creped;

the followin 7 ingredients in the quantities indicated or multiples thereof- 35 Elemigum /4 lb. /2 second,nitrocellulose 3 lb. Blowncastor oil 2 oz. Toluol 2 pts. Isopropyl acetate "a 6 pts.

Antimony oxide (per gal.

Calcium stearate \(per gal.

.1 batmflniz oz. of bath).. lbs.

.The bath is prepared by dissolving the Elemi gum in the toluol, the acetate, and then addin replaced by any :50 run between cooperat tance between whic desired thickness of coating on the thereafter the paper is reel. .If the article to 55 contains corners oran dissolving the nitrocellulose mixing the two solutions together the o'iL-stearate and oxide. castor 'oil functions as a plasticizer and may other plasticizer common Hg h is adjusted to leave the The to the treated paper squeeze rolls, the disdried and wonnd on a wrapped in the paper inequality in all directions the paper is desirably corrugated or embossed.

When flat paper is used as the starting mais unwound from a roll and run through a coater, of the leather or lithographic type, containinga bath made above, thus coating the paper on Thereafter the paper is dried and rewound. Then the paper is passed through the creping machine with the uncoated side en a the creping 10 cylinder, 1 producing .aicreped paper coated on one side or face, whereupon the paper is dried j and rewound. Tofinish the product, the paper is again passed through the coating machine toapply the lacquer to the then still uncoated paper 5 face, and the paper is dried and rewound thus rendering'it ready for use; This paper may be corrugated or embossed, as previously described.

It will be understood that any paper of any weight, cylinder or Foudrinier, may be used as the basis. 1 preferably employ paper of to pounds basis, 24 x 36-480 sheets tothe ream, of uniform thickness and density.

I have indicated above that the lacquer solu-. tion is applied to the paper by passing the latter through a bath containing such solution but I deslreto point out that the solution may be :sprayed on the paper with substantially equally satisfactory results.

Any suitable apparatus may be used for prac- 30 ticing my improved method,-. and' such apparatus forms no part "of my invention. Merely by way ofillustration I have shown two forms ofapparatus in fragmentary form, in the accompanying drawing in which Fig. 1 is a diagrammatic view of parts of an apparatus for passing creped paper through abath and Fig. 2 is a similar view -ofparts of anap'paratus for spraying the lacquer solution on the paper which initially may be either creped or uncreped.

In Fig. 1, the roll-of creped paper is denoted l0. From the roll the paper passes over and under H and 12 through the waterproofing bath l3 in the tank LII, out between the squeeze rolls ii the distance between which may be varied by the adjusting mec 8, thence over the guide roll- H to the dryer (not shown). 1 VJ In Fig. 2, the roll of paperpwhich maybe either flat or creped is denoted No: If the paper '-is flat it is first passed over the creping roller 20, while if the paper constituting the roll Illa is creped the roller 20 is omitted. In this form of apparatus the. squeeze rolls lt are vertically superimposed and the distance between .themis as a,oa'9;a eo r regulated by the adjusting device We In adconformation and,if glued to an object, may be vance ofthe squeeze rolls a spray nozzle I in diswashed ofl' therefrom.

c ges a stream of the wate proofing solution I 01 from a tank (not shown) onto the paper prior to p I. The method of producing a waterproofed the creping ratiogwhich is the fiat paper before and is determin plastic product, which paper with aqueous solution con stearate' in an organic solven comprises treating creped a non-aqueous solution containing a pigment, a solvent.

3. The method of producing a waterproofed plastic product oiution consisting of Elemi said paper, creping said paper, and thereafter treating the other face of said paper with a nona pigment anda EanLn' v.

which comprises treating creped' 

